CAJ | 학술논문

针对谐波阻抗难以准确获取的情况，提出一种谐波阻抗未知条件下的谐波源定位方法。通过可观性分析及象征导纳矩阵，得到量测配置点。将谐波电压作为量测量，采用独立分量分析算法对谐波电流进行估计。通过次序辨识算法解决谐波源电流估计的序列问题，且根据目标函数最小值的寻优，对谐波源位置进行定位。为验证提出方法的有效性，在IEEE-14节点系统上进行了仿真测试，通过方差、相关系数2个评价指标得知，提出的方法能对谐波源进行准确估计和定位。
침대해파조항난이준학획취적정황，제출일충해파조항미지조건하적해파원정위방법。통과가관성분석급상정도납구진，득도량측배치점。장해파전압작위량측량，채용독립분량분석산법대해파전류진행고계。통과차서변식산법해결해파원전류고계적서렬문제，차근거목표함수최소치적심우，대해파원위치진행정위。위험증제출방법적유효성，재IEEE-14절점계통상진행료방진측시，통과방차、상관계수2개평개지표득지，제출적방법능대해파원진행준학고계화정위。
In allusion to the condition that the harmonic impedance is difficult to be attained accurately, a harmonic source location method under unknown harmonic impedance is proposed. Through observability analysis and symbolic admittance matrix, the measurement point can be achieved. Taking harmonic voltage as the quantity to be measured, the harmonic current is estimated by independent component analysis (ICA). The sequence of current estimation of harmonic source is solved by identification algorithm. And according to the search of the minimum value of objective function, the position of harmonic source can be located. To verify the validity of the proposed method, the simulation test by IEEE 14-bus system is performed. From the two evaluation indices of variance and correlation coefficient, it is proved that the proposed method can accurately estimate and locate the harmonic source.